434 lines
11 KiB
LLVM
434 lines
11 KiB
LLVM
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||
|
|
; RUN: opt < %s -instsimplify -S | FileCheck %s
|
||
|
|
|
||
|
|
define i32 @fold(i32 %x) {
|
||
|
|
; CHECK-LABEL: @fold(
|
||
|
|
; CHECK-NEXT: [[Y:%.*]] = freeze i32 [[X:%.*]]
|
||
|
|
; CHECK-NEXT: ret i32 [[Y]]
|
||
|
|
;
|
||
|
|
%y = freeze i32 %x
|
||
|
|
%z = freeze i32 %y
|
||
|
|
ret i32 %z
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @make_const() {
|
||
|
|
; CHECK-LABEL: @make_const(
|
||
|
|
; CHECK-NEXT: ret i32 10
|
||
|
|
;
|
||
|
|
%x = freeze i32 10
|
||
|
|
ret i32 %x
|
||
|
|
}
|
||
|
|
|
||
|
|
define float @make_const2() {
|
||
|
|
; CHECK-LABEL: @make_const2(
|
||
|
|
; CHECK-NEXT: ret float 1.000000e+01
|
||
|
|
;
|
||
|
|
%x = freeze float 10.0
|
||
|
|
ret float %x
|
||
|
|
}
|
||
|
|
|
||
|
|
@glb = constant i32 0
|
||
|
|
|
||
|
|
define i32* @make_const_glb() {
|
||
|
|
; CHECK-LABEL: @make_const_glb(
|
||
|
|
; CHECK-NEXT: ret i32* @glb
|
||
|
|
;
|
||
|
|
%k = freeze i32* @glb
|
||
|
|
ret i32* %k
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32()* @make_const_fn() {
|
||
|
|
; CHECK-LABEL: @make_const_fn(
|
||
|
|
; CHECK-NEXT: ret i32 ()* @make_const
|
||
|
|
;
|
||
|
|
%k = freeze i32()* @make_const
|
||
|
|
ret i32()* %k
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32* @make_const_null() {
|
||
|
|
; CHECK-LABEL: @make_const_null(
|
||
|
|
; CHECK-NEXT: ret i32* null
|
||
|
|
;
|
||
|
|
%k = freeze i32* null
|
||
|
|
ret i32* %k
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i32> @constvector() {
|
||
|
|
; CHECK-LABEL: @constvector(
|
||
|
|
; CHECK-NEXT: ret <2 x i32> <i32 0, i32 1>
|
||
|
|
;
|
||
|
|
%x = freeze <2 x i32> <i32 0, i32 1>
|
||
|
|
ret <2 x i32> %x
|
||
|
|
}
|
||
|
|
|
||
|
|
define <3 x i5> @constvector_weird() {
|
||
|
|
; CHECK-LABEL: @constvector_weird(
|
||
|
|
; CHECK-NEXT: ret <3 x i5> <i5 0, i5 1, i5 10>
|
||
|
|
;
|
||
|
|
%x = freeze <3 x i5> <i5 0, i5 1, i5 42>
|
||
|
|
ret <3 x i5> %x
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x float> @constvector_FP() {
|
||
|
|
; CHECK-LABEL: @constvector_FP(
|
||
|
|
; CHECK-NEXT: ret <2 x float> <float 0.000000e+00, float 1.000000e+00>
|
||
|
|
;
|
||
|
|
%x = freeze <2 x float> <float 0.0, float 1.0>
|
||
|
|
ret <2 x float> %x
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test
|
||
|
|
|
||
|
|
define <2 x i32> @constvector_noopt() {
|
||
|
|
; CHECK-LABEL: @constvector_noopt(
|
||
|
|
; CHECK-NEXT: [[X:%.*]] = freeze <2 x i32> <i32 0, i32 undef>
|
||
|
|
; CHECK-NEXT: ret <2 x i32> [[X]]
|
||
|
|
;
|
||
|
|
%x = freeze <2 x i32> <i32 0, i32 undef>
|
||
|
|
ret <2 x i32> %x
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test
|
||
|
|
|
||
|
|
define <3 x i5> @constvector_weird_noopt() {
|
||
|
|
; CHECK-LABEL: @constvector_weird_noopt(
|
||
|
|
; CHECK-NEXT: [[X:%.*]] = freeze <3 x i5> <i5 0, i5 undef, i5 10>
|
||
|
|
; CHECK-NEXT: ret <3 x i5> [[X]]
|
||
|
|
;
|
||
|
|
%x = freeze <3 x i5> <i5 0, i5 undef, i5 42>
|
||
|
|
ret <3 x i5> %x
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test
|
||
|
|
|
||
|
|
define <2 x float> @constvector_FP_noopt() {
|
||
|
|
; CHECK-LABEL: @constvector_FP_noopt(
|
||
|
|
; CHECK-NEXT: [[X:%.*]] = freeze <2 x float> <float 0.000000e+00, float undef>
|
||
|
|
; CHECK-NEXT: ret <2 x float> [[X]]
|
||
|
|
;
|
||
|
|
%x = freeze <2 x float> <float 0.0, float undef>
|
||
|
|
ret <2 x float> %x
|
||
|
|
}
|
||
|
|
|
||
|
|
@g = external global i16, align 1
|
||
|
|
@g2 = external global i16, align 1
|
||
|
|
|
||
|
|
define float @constant_expr() {
|
||
|
|
; CHECK-LABEL: @constant_expr(
|
||
|
|
; CHECK-NEXT: ret float bitcast (i32 ptrtoint (i16* @g to i32) to float)
|
||
|
|
;
|
||
|
|
%r = freeze float bitcast (i32 ptrtoint (i16* @g to i32) to float)
|
||
|
|
ret float %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8* @constant_expr2() {
|
||
|
|
; CHECK-LABEL: @constant_expr2(
|
||
|
|
; CHECK-NEXT: ret i8* bitcast (i16* @g to i8*)
|
||
|
|
;
|
||
|
|
%r = freeze i8* bitcast (i16* @g to i8*)
|
||
|
|
ret i8* %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32* @constant_expr3() {
|
||
|
|
; CHECK-LABEL: @constant_expr3(
|
||
|
|
; CHECK-NEXT: ret i32* getelementptr (i32, i32* @glb, i64 3)
|
||
|
|
;
|
||
|
|
%r = freeze i32* getelementptr (i32, i32* @glb, i64 3)
|
||
|
|
ret i32* %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i64 @ptrdiff() {
|
||
|
|
; CHECK-LABEL: @ptrdiff(
|
||
|
|
; CHECK-NEXT: ret i64 sub (i64 ptrtoint (i16* @g to i64), i64 ptrtoint (i16* @g2 to i64))
|
||
|
|
;
|
||
|
|
%i = ptrtoint i16* @g to i64
|
||
|
|
%i2 = ptrtoint i16* @g2 to i64
|
||
|
|
%diff = sub i64 %i, %i2
|
||
|
|
%r = freeze i64 %diff
|
||
|
|
ret i64 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test
|
||
|
|
|
||
|
|
define <2 x i31> @vector_element_constant_expr() {
|
||
|
|
; CHECK-LABEL: @vector_element_constant_expr(
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = freeze <2 x i31> <i31 34, i31 ptrtoint (i16* @g to i31)>
|
||
|
|
; CHECK-NEXT: ret <2 x i31> [[R]]
|
||
|
|
;
|
||
|
|
%r = freeze <2 x i31> <i31 34, i31 ptrtoint (i16* @g to i31)>
|
||
|
|
ret <2 x i31> %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @alloca() {
|
||
|
|
; CHECK-LABEL: @alloca(
|
||
|
|
; CHECK-NEXT: [[P:%.*]] = alloca i8, align 1
|
||
|
|
; CHECK-NEXT: call void @f3(i8* [[P]])
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
%p = alloca i8
|
||
|
|
%y = freeze i8* %p
|
||
|
|
call void @f3(i8* %y)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8* @gep() {
|
||
|
|
; CHECK-LABEL: @gep(
|
||
|
|
; CHECK-NEXT: [[P:%.*]] = alloca [4 x i8], align 1
|
||
|
|
; CHECK-NEXT: [[Q:%.*]] = getelementptr [4 x i8], [4 x i8]* [[P]], i32 0, i32 6
|
||
|
|
; CHECK-NEXT: ret i8* [[Q]]
|
||
|
|
;
|
||
|
|
%p = alloca [4 x i8]
|
||
|
|
%q = getelementptr [4 x i8], [4 x i8]* %p, i32 0, i32 6
|
||
|
|
%q2 = freeze i8* %q
|
||
|
|
ret i8* %q2
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8* @gep_noopt(i32 %arg) {
|
||
|
|
; CHECK-LABEL: @gep_noopt(
|
||
|
|
; CHECK-NEXT: [[Q:%.*]] = getelementptr [4 x i8], [4 x i8]* null, i32 0, i32 [[ARG:%.*]]
|
||
|
|
; CHECK-NEXT: [[Q2:%.*]] = freeze i8* [[Q]]
|
||
|
|
; CHECK-NEXT: ret i8* [[Q2]]
|
||
|
|
;
|
||
|
|
%q = getelementptr [4 x i8], [4 x i8]* null, i32 0, i32 %arg
|
||
|
|
%q2 = freeze i8* %q
|
||
|
|
ret i8* %q2
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8* @gep_inbounds() {
|
||
|
|
; CHECK-LABEL: @gep_inbounds(
|
||
|
|
; CHECK-NEXT: [[P:%.*]] = alloca [4 x i8], align 1
|
||
|
|
; CHECK-NEXT: [[Q:%.*]] = getelementptr inbounds [4 x i8], [4 x i8]* [[P]], i32 0, i32 0
|
||
|
|
; CHECK-NEXT: ret i8* [[Q]]
|
||
|
|
;
|
||
|
|
%p = alloca [4 x i8]
|
||
|
|
%q = getelementptr inbounds [4 x i8], [4 x i8]* %p, i32 0, i32 0
|
||
|
|
%q2 = freeze i8* %q
|
||
|
|
ret i8* %q2
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8* @gep_inbounds_noopt(i32 %arg) {
|
||
|
|
; CHECK-LABEL: @gep_inbounds_noopt(
|
||
|
|
; CHECK-NEXT: [[P:%.*]] = alloca [4 x i8], align 1
|
||
|
|
; CHECK-NEXT: [[Q:%.*]] = getelementptr inbounds [4 x i8], [4 x i8]* [[P]], i32 0, i32 [[ARG:%.*]]
|
||
|
|
; CHECK-NEXT: [[Q2:%.*]] = freeze i8* [[Q]]
|
||
|
|
; CHECK-NEXT: ret i8* [[Q2]]
|
||
|
|
;
|
||
|
|
%p = alloca [4 x i8]
|
||
|
|
%q = getelementptr inbounds [4 x i8], [4 x i8]* %p, i32 0, i32 %arg
|
||
|
|
%q2 = freeze i8* %q
|
||
|
|
ret i8* %q2
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32* @gep_inbounds_null() {
|
||
|
|
; CHECK-LABEL: @gep_inbounds_null(
|
||
|
|
; CHECK-NEXT: ret i32* null
|
||
|
|
;
|
||
|
|
%p = getelementptr inbounds i32, i32* null, i32 0
|
||
|
|
%k = freeze i32* %p
|
||
|
|
ret i32* %k
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32* @gep_inbounds_null_noopt(i32* %p) {
|
||
|
|
; CHECK-LABEL: @gep_inbounds_null_noopt(
|
||
|
|
; CHECK-NEXT: [[K:%.*]] = freeze i32* [[P:%.*]]
|
||
|
|
; CHECK-NEXT: ret i32* [[K]]
|
||
|
|
;
|
||
|
|
%q = getelementptr inbounds i32, i32* %p, i32 0
|
||
|
|
%k = freeze i32* %q
|
||
|
|
ret i32* %k
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @icmp(i32 %a, i32 %b) {
|
||
|
|
; CHECK-LABEL: @icmp(
|
||
|
|
; CHECK-NEXT: [[A_FR:%.*]] = freeze i32 [[A:%.*]]
|
||
|
|
; CHECK-NEXT: [[B_FR:%.*]] = freeze i32 [[B:%.*]]
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[A_FR]], [[B_FR]]
|
||
|
|
; CHECK-NEXT: ret i1 [[C]]
|
||
|
|
;
|
||
|
|
%a.fr = freeze i32 %a
|
||
|
|
%b.fr = freeze i32 %b
|
||
|
|
%c = icmp eq i32 %a.fr, %b.fr
|
||
|
|
%c.fr = freeze i1 %c
|
||
|
|
ret i1 %c.fr
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @icmp_noopt(i32 %a, i32 %b) {
|
||
|
|
; CHECK-LABEL: @icmp_noopt(
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
|
||
|
|
; CHECK-NEXT: [[C_FR:%.*]] = freeze i1 [[C]]
|
||
|
|
; CHECK-NEXT: ret i1 [[C_FR]]
|
||
|
|
;
|
||
|
|
%c = icmp eq i32 %a, %b
|
||
|
|
%c.fr = freeze i1 %c
|
||
|
|
ret i1 %c.fr
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @fcmp(float %x, float %y) {
|
||
|
|
; CHECK-LABEL: @fcmp(
|
||
|
|
; CHECK-NEXT: [[FX:%.*]] = freeze float [[X:%.*]]
|
||
|
|
; CHECK-NEXT: [[FY:%.*]] = freeze float [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = fcmp oeq float [[FX]], [[FY]]
|
||
|
|
; CHECK-NEXT: ret i1 [[C]]
|
||
|
|
;
|
||
|
|
%fx = freeze float %x
|
||
|
|
%fy = freeze float %y
|
||
|
|
%c = fcmp oeq float %fx, %fy
|
||
|
|
%fc = freeze i1 %c
|
||
|
|
ret i1 %fc
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @fcmp_noopt(float %x, float %y) {
|
||
|
|
; CHECK-LABEL: @fcmp_noopt(
|
||
|
|
; CHECK-NEXT: [[FX:%.*]] = freeze float [[X:%.*]]
|
||
|
|
; CHECK-NEXT: [[FY:%.*]] = freeze float [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = fcmp nnan oeq float [[FX]], [[FY]]
|
||
|
|
; CHECK-NEXT: [[FC:%.*]] = freeze i1 [[C]]
|
||
|
|
; CHECK-NEXT: ret i1 [[FC]]
|
||
|
|
;
|
||
|
|
%fx = freeze float %x
|
||
|
|
%fy = freeze float %y
|
||
|
|
%c = fcmp nnan oeq float %fx, %fy
|
||
|
|
%fc = freeze i1 %c
|
||
|
|
ret i1 %fc
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @brcond(i1 %c, i1 %c2) {
|
||
|
|
; CHECK-LABEL: @brcond(
|
||
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[A:%.*]], label [[B:%.*]]
|
||
|
|
; CHECK: A:
|
||
|
|
; CHECK-NEXT: br i1 [[C2:%.*]], label [[A2:%.*]], label [[B]]
|
||
|
|
; CHECK: A2:
|
||
|
|
; CHECK-NEXT: ret i1 [[C]]
|
||
|
|
; CHECK: B:
|
||
|
|
; CHECK-NEXT: ret i1 [[C]]
|
||
|
|
;
|
||
|
|
br i1 %c, label %A, label %B
|
||
|
|
A:
|
||
|
|
br i1 %c2, label %A2, label %B
|
||
|
|
A2:
|
||
|
|
%f1 = freeze i1 %c
|
||
|
|
ret i1 %f1
|
||
|
|
B:
|
||
|
|
%f2 = freeze i1 %c
|
||
|
|
ret i1 %f2
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @phi(i1 %cond, i1 %cond2, i32 %a0, i32 %a1) {
|
||
|
|
; CHECK-LABEL: @phi(
|
||
|
|
; CHECK-NEXT: ENTRY:
|
||
|
|
; CHECK-NEXT: [[A0_FR:%.*]] = freeze i32 [[A0:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
|
||
|
|
; CHECK: BB1:
|
||
|
|
; CHECK-NEXT: [[A1_FR:%.*]] = freeze i32 [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[COND2:%.*]], label [[BB2]], label [[EXIT:%.*]]
|
||
|
|
; CHECK: BB2:
|
||
|
|
; CHECK-NEXT: [[PHI1:%.*]] = phi i32 [ [[A0_FR]], [[ENTRY:%.*]] ], [ [[A1_FR]], [[BB1]] ]
|
||
|
|
; CHECK-NEXT: br label [[EXIT]]
|
||
|
|
; CHECK: EXIT:
|
||
|
|
; CHECK-NEXT: [[PHI2:%.*]] = phi i32 [ [[A0_FR]], [[BB1]] ], [ [[PHI1]], [[BB2]] ]
|
||
|
|
; CHECK-NEXT: ret i32 [[PHI2]]
|
||
|
|
;
|
||
|
|
ENTRY:
|
||
|
|
%a0.fr = freeze i32 %a0
|
||
|
|
br i1 %cond, label %BB1, label %BB2
|
||
|
|
BB1:
|
||
|
|
%a1.fr = freeze i32 %a1
|
||
|
|
br i1 %cond2, label %BB2, label %EXIT
|
||
|
|
BB2:
|
||
|
|
%phi1 = phi i32 [%a0.fr, %ENTRY], [%a1.fr, %BB1]
|
||
|
|
br label %EXIT
|
||
|
|
EXIT:
|
||
|
|
%phi2 = phi i32 [%a0.fr, %BB1], [%phi1, %BB2]
|
||
|
|
%phi2.fr = freeze i32 %phi2
|
||
|
|
ret i32 %phi2.fr
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @phi_noopt(i1 %cond, i1 %cond2, i32 %a0, i32 %a1) {
|
||
|
|
; CHECK-LABEL: @phi_noopt(
|
||
|
|
; CHECK-NEXT: ENTRY:
|
||
|
|
; CHECK-NEXT: [[A0_FR:%.*]] = freeze i32 [[A0:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
|
||
|
|
; CHECK: BB1:
|
||
|
|
; CHECK-NEXT: br i1 [[COND2:%.*]], label [[BB2]], label [[EXIT:%.*]]
|
||
|
|
; CHECK: BB2:
|
||
|
|
; CHECK-NEXT: [[PHI1:%.*]] = phi i32 [ [[A0_FR]], [[ENTRY:%.*]] ], [ [[A1:%.*]], [[BB1]] ]
|
||
|
|
; CHECK-NEXT: br label [[EXIT]]
|
||
|
|
; CHECK: EXIT:
|
||
|
|
; CHECK-NEXT: [[PHI2:%.*]] = phi i32 [ [[A0_FR]], [[BB1]] ], [ [[PHI1]], [[BB2]] ]
|
||
|
|
; CHECK-NEXT: [[PHI2_FR:%.*]] = freeze i32 [[PHI2]]
|
||
|
|
; CHECK-NEXT: ret i32 [[PHI2_FR]]
|
||
|
|
;
|
||
|
|
ENTRY:
|
||
|
|
%a0.fr = freeze i32 %a0
|
||
|
|
br i1 %cond, label %BB1, label %BB2
|
||
|
|
BB1:
|
||
|
|
br i1 %cond2, label %BB2, label %EXIT
|
||
|
|
BB2:
|
||
|
|
%phi1 = phi i32 [%a0.fr, %ENTRY], [%a1, %BB1]
|
||
|
|
br label %EXIT
|
||
|
|
EXIT:
|
||
|
|
%phi2 = phi i32 [%a0.fr, %BB1], [%phi1, %BB2]
|
||
|
|
%phi2.fr = freeze i32 %phi2
|
||
|
|
ret i32 %phi2.fr
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @brcond_switch(i32 %x) {
|
||
|
|
; CHECK-LABEL: @brcond_switch(
|
||
|
|
; CHECK-NEXT: switch i32 [[X:%.*]], label [[EXIT:%.*]] [
|
||
|
|
; CHECK-NEXT: i32 0, label [[A:%.*]]
|
||
|
|
; CHECK-NEXT: ]
|
||
|
|
; CHECK: A:
|
||
|
|
; CHECK-NEXT: ret i32 [[X]]
|
||
|
|
; CHECK: EXIT:
|
||
|
|
; CHECK-NEXT: ret i32 [[X]]
|
||
|
|
;
|
||
|
|
switch i32 %x, label %EXIT [ i32 0, label %A ]
|
||
|
|
A:
|
||
|
|
%fr1 = freeze i32 %x
|
||
|
|
ret i32 %fr1
|
||
|
|
EXIT:
|
||
|
|
%fr2 = freeze i32 %x
|
||
|
|
ret i32 %fr2
|
||
|
|
}
|
||
|
|
|
||
|
|
declare i32 @any_num()
|
||
|
|
|
||
|
|
define i32 @brcond_call() {
|
||
|
|
; CHECK-LABEL: @brcond_call(
|
||
|
|
; CHECK-NEXT: [[X:%.*]] = call i32 @any_num()
|
||
|
|
; CHECK-NEXT: switch i32 [[X]], label [[EXIT:%.*]] [
|
||
|
|
; CHECK-NEXT: ]
|
||
|
|
; CHECK: EXIT:
|
||
|
|
; CHECK-NEXT: ret i32 [[X]]
|
||
|
|
;
|
||
|
|
%x = call i32 @any_num()
|
||
|
|
switch i32 %x, label %EXIT []
|
||
|
|
EXIT:
|
||
|
|
%y = freeze i32 %x
|
||
|
|
ret i32 %y
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @brcond_noopt(i1 %c, i1 %c2) {
|
||
|
|
; CHECK-LABEL: @brcond_noopt(
|
||
|
|
; CHECK-NEXT: [[F:%.*]] = freeze i1 [[C:%.*]]
|
||
|
|
; CHECK-NEXT: call void @f1(i1 [[F]])
|
||
|
|
; CHECK-NEXT: call void @f2()
|
||
|
|
; CHECK-NEXT: br i1 [[C]], label [[A:%.*]], label [[B:%.*]]
|
||
|
|
; CHECK: A:
|
||
|
|
; CHECK-NEXT: ret i1 false
|
||
|
|
; CHECK: B:
|
||
|
|
; CHECK-NEXT: ret i1 true
|
||
|
|
;
|
||
|
|
%f = freeze i1 %c
|
||
|
|
call void @f1(i1 %f) ; cannot optimize i1 %f to %c
|
||
|
|
call void @f2() ; .. because if f2() exits, `br %c` cannot be reached
|
||
|
|
br i1 %c, label %A, label %B
|
||
|
|
A:
|
||
|
|
ret i1 0
|
||
|
|
B:
|
||
|
|
ret i1 1
|
||
|
|
}
|
||
|
|
declare void @f1(i1)
|
||
|
|
declare void @f2()
|
||
|
|
declare void @f3(i8*)
|