+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; PR4374
+
define float @test1(float %a, float %b) nounwind {
+; CHECK-LABEL: @test1(
+; CHECK-NEXT: [[T1:%.*]] = fsub float [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[T2:%.*]] = fsub float -0.000000e+00, [[T1]]
+; CHECK-NEXT: ret float [[T2]]
+;
%t1 = fsub float %a, %b
%t2 = fsub float -0.000000e+00, %t1
-
-; CHECK: %t1 = fsub float %a, %b
-; CHECK-NEXT: %t2 = fsub float -0.000000e+00, %t1
-
ret float %t2
}
; <rdar://problem/7530098>
+
define double @test2(double %x, double %y) nounwind {
+; CHECK-LABEL: @test2(
+; CHECK-NEXT: [[T1:%.*]] = fadd double [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[T2:%.*]] = fsub double [[X]], [[T1]]
+; CHECK-NEXT: ret double [[T2]]
+;
%t1 = fadd double %x, %y
%t2 = fsub double %x, %t1
-
-; CHECK: %t1 = fadd double %x, %y
-; CHECK-NEXT: %t2 = fsub double %x, %t1
-
ret double %t2
}
-; CHECK-LABEL: @fsub_undef(
-; CHECK: %sub = fsub float %val, undef
define float @fsub_undef(float %val) {
-bb:
+; CHECK-LABEL: @fsub_undef(
+; CHECK-NEXT: [[SUB:%.*]] = fsub float [[VAL:%.*]], undef
+; CHECK-NEXT: ret float [[SUB]]
+;
%sub = fsub float %val, undef
ret float %sub
}
; XXX - Why doesn't this fold to undef?
-; CHECK-LABEL: @fsub_fast_undef(
-; CHCK: %sub = fsub fast float %val, undef
+
define float @fsub_fast_undef(float %val) {
-bb:
+; CHECK-LABEL: @fsub_fast_undef(
+; CHECK-NEXT: [[SUB:%.*]] = fsub fast float [[VAL:%.*]], undef
+; CHECK-NEXT: ret float [[SUB]]
+;
%sub = fsub fast float %val, undef
ret float %sub
}
-; CHECK-LABEL: @fneg_undef(
-; CHECK: ret float fsub (float -0.000000e+00, float undef)
define float @fneg_undef(float %val) {
-bb:
+; CHECK-LABEL: @fneg_undef(
+; CHECK-NEXT: ret float fsub (float -0.000000e+00, float undef)
+;
%sub = fsub float -0.0, undef
ret float %sub
}
-; CHECK-LABEL: @fneg_fast_undef(
-; CHECK: ret float fsub (float -0.000000e+00, float undef)
define float @fneg_fast_undef(float %val) {
-bb:
+; CHECK-LABEL: @fneg_fast_undef(
+; CHECK-NEXT: ret float fsub (float -0.000000e+00, float undef)
+;
%sub = fsub fast float -0.0, undef
ret float %sub
}
; This folds to a constant expression, which produced 0 instructions
; contrary to the expected one for negation.
-; CHECK-LABEL: @inconsistent_numbers_fsub_undef(
-; CHECK: ret float fsub (float -0.000000e+00, float undef)
+
define float @inconsistent_numbers_fsub_undef(float %val) {
-bb:
+; CHECK-LABEL: @inconsistent_numbers_fsub_undef(
+; CHECK-NEXT: ret float fsub (float -0.000000e+00, float undef)
+;
%sub0 = fsub fast float %val, undef
%sub1 = fsub fast float %sub0, %val
ret float %sub1
}
+