[InstCombine] auto-generate better checks; NFC

llvm-svn: 298377

llvm/test/Transforms/InstCombine/add-sitofp.ll

@@ -1,6 +1,14 @@
-; RUN: opt < %s -instcombine -S | grep "add nuw nsw i32"
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
 
-define double @x(i32 %a, i32 %b) nounwind {
+define double @x(i32 %a, i32 %b) {
+; CHECK-LABEL: @x(
+; CHECK-NEXT:    [[M:%.*]] = lshr i32 [[A:%.*]], 24
+; CHECK-NEXT:    [[N:%.*]] = and i32 [[M]], [[B:%.*]]
+; CHECK-NEXT:    [[ADDCONV:%.*]] = add nuw nsw i32 [[N]], 1
+; CHECK-NEXT:    [[P:%.*]] = sitofp i32 [[ADDCONV]] to double
+; CHECK-NEXT:    ret double [[P]]
+;
   %m = lshr i32 %a, 24
   %n = and i32 %m, %b
   %o = sitofp i32 %n to double

llvm/test/Transforms/InstCombine/sitofp.ll

@@ -1,41 +1,47 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -instcombine -S | FileCheck %s
 
-; CHECK-LABEL: test1
-; CHECK: ret i1 true
 define i1 @test1(i8 %A) {
+; CHECK-LABEL: @test1(
+; CHECK-NEXT:    ret i1 true
+;
   %B = sitofp i8 %A to double
   %C = fcmp ult double %B, 128.0
   ret i1 %C
 }
 
-; CHECK-LABEL: test2
-; CHECK: ret i1 true
 define i1 @test2(i8 %A) {
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:    ret i1 true
+;
   %B = sitofp i8 %A to double
   %C = fcmp ugt double %B, -128.1
   ret i1 %C
 }
 
-; CHECK-LABEL: test3
-; CHECK: ret i1 true
 define i1 @test3(i8 %A) {
+; CHECK-LABEL: @test3(
+; CHECK-NEXT:    ret i1 true
+;
   %B = sitofp i8 %A to double
   %C = fcmp ule double %B, 127.0
   ret i1 %C
 }
 
-; CHECK-LABEL: test4
-; CHECK: icmp ne i8 %A, 127
-; CHECK-NEXT: ret i1
 define i1 @test4(i8 %A) {
+; CHECK-LABEL: @test4(
+; CHECK-NEXT:    [[C:%.*]] = icmp ne i8 [[A:%.*]], 127
+; CHECK-NEXT:    ret i1 [[C]]
+;
   %B = sitofp i8 %A to double
   %C = fcmp ult double %B, 127.0
   ret i1 %C
 }
 
-; CHECK-LABEL: test5
-; CHECK: ret i32
 define i32 @test5(i32 %A) {
+; CHECK-LABEL: @test5(
+; CHECK-NEXT:    ret i32 [[A:%.*]]
+;
   %B = sitofp i32 %A to double
   %C = fptosi double %B to i32
   %D = uitofp i32 %C to double
@@ -43,10 +49,11 @@ define i32 @test5(i32 %A) {
   ret i32 %E
 }
 
-; CHECK-LABEL: test6
-; CHECK: and i32 %A, 39
-; CHECK-NEXT: ret i32
 define i32 @test6(i32 %A) {
+; CHECK-LABEL: @test6(
+; CHECK-NEXT:    [[ADDCONV:%.*]] = and i32 [[A:%.*]], 39
+; CHECK-NEXT:    ret i32 [[ADDCONV]]
+;
   %B = and i32 %A, 7
   %C = and i32 %A, 32
   %D = sitofp i32 %B to double
@@ -56,35 +63,39 @@ define i32 @test6(i32 %A) {
   ret i32 %G
 }
 
-; CHECK-LABEL: test7
-; CHECK: ret i32
-define i32 @test7(i32 %A) nounwind {
+define i32 @test7(i32 %A) {
+; CHECK-LABEL: @test7(
+; CHECK-NEXT:    ret i32 [[A:%.*]]
+;
   %B = sitofp i32 %A to double
   %C = fptoui double %B to i32
   ret i32 %C
 }
 
-; CHECK-LABEL: test8
-; CHECK: ret i32
-define i32 @test8(i32 %A) nounwind {
+define i32 @test8(i32 %A) {
+; CHECK-LABEL: @test8(
+; CHECK-NEXT:    ret i32 [[A:%.*]]
+;
   %B = uitofp i32 %A to double
   %C = fptosi double %B to i32
   ret i32 %C
 }
 
-; CHECK-LABEL: test9
-; CHECK: zext i8
-; CHECK-NEXT: ret i32
-define i32 @test9(i8 %A) nounwind {
+define i32 @test9(i8 %A) {
+; CHECK-LABEL: @test9(
+; CHECK-NEXT:    [[C:%.*]] = zext i8 [[A:%.*]] to i32
+; CHECK-NEXT:    ret i32 [[C]]
+;
   %B = sitofp i8 %A to float
   %C = fptoui float %B to i32
   ret i32 %C
 }
 
-; CHECK-LABEL: test10
-; CHECK: sext i8
-; CHECK-NEXT: ret i32
-define i32 @test10(i8 %A) nounwind {
+define i32 @test10(i8 %A) {
+; CHECK-LABEL: @test10(
+; CHECK-NEXT:    [[C:%.*]] = sext i8 [[A:%.*]] to i32
+; CHECK-NEXT:    ret i32 [[C]]
+;
   %B = sitofp i8 %A to float
   %C = fptosi float %B to i32
   ret i32 %C
@@ -92,10 +103,12 @@ define i32 @test10(i8 %A) nounwind {
 
 ; If the input value is outside of the range of the output cast, it's
 ; undefined behavior, so we can assume it fits.
-; CHECK-LABEL: test11
-; CHECK: trunc
-; CHECK-NEXT: ret i8
-define i8 @test11(i32 %A) nounwind {
+
+define i8 @test11(i32 %A) {
+; CHECK-LABEL: @test11(
+; CHECK-NEXT:    [[C:%.*]] = trunc i32 [[A:%.*]] to i8
+; CHECK-NEXT:    ret i8 [[C]]
+;
   %B = sitofp i32 %A to float
   %C = fptosi float %B to i8
   ret i8 %C
@@ -103,82 +116,103 @@ define i8 @test11(i32 %A) nounwind {
 
 ; If the input value is negative, it'll be outside the range of the
 ; output cast, and thus undefined behavior.
-; CHECK-LABEL: test12
-; CHECK: zext i8
-; CHECK-NEXT: ret i32
-define i32 @test12(i8 %A) nounwind {
+
+define i32 @test12(i8 %A) {
+; CHECK-LABEL: @test12(
+; CHECK-NEXT:    [[C:%.*]] = zext i8 [[A:%.*]] to i32
+; CHECK-NEXT:    ret i32 [[C]]
+;
   %B = sitofp i8 %A to float
   %C = fptoui float %B to i32
   ret i32 %C
 }
 
 ; This can't fold because the 25-bit input doesn't fit in the mantissa.
-; CHECK-LABEL: test13
-; CHECK: uitofp
-; CHECK-NEXT: fptoui
-define i32 @test13(i25 %A) nounwind {
+
+define i32 @test13(i25 %A) {
+; CHECK-LABEL: @test13(
+; CHECK-NEXT:    [[B:%.*]] = uitofp i25 [[A:%.*]] to float
+; CHECK-NEXT:    [[C:%.*]] = fptoui float [[B]] to i32
+; CHECK-NEXT:    ret i32 [[C]]
+;
   %B = uitofp i25 %A to float
   %C = fptoui float %B to i32
   ret i32 %C
 }
 
 ; But this one can.
-; CHECK-LABEL: test14
-; CHECK: zext i24
-; CHECK-NEXT: ret i32
-define i32 @test14(i24 %A) nounwind {
+
+define i32 @test14(i24 %A) {
+; CHECK-LABEL: @test14(
+; CHECK-NEXT:    [[C:%.*]] = zext i24 [[A:%.*]] to i32
+; CHECK-NEXT:    ret i32 [[C]]
+;
   %B = uitofp i24 %A to float
   %C = fptoui float %B to i32
   ret i32 %C
 }
 
 ; And this one can too.
-; CHECK-LABEL: test15
-; CHECK: trunc i32
-; CHECK-NEXT: ret i24
-define i24 @test15(i32 %A) nounwind {
+
+define i24 @test15(i32 %A) {
+; CHECK-LABEL: @test15(
+; CHECK-NEXT:    [[C:%.*]] = trunc i32 [[A:%.*]] to i24
+; CHECK-NEXT:    ret i24 [[C]]
+;
   %B = uitofp i32 %A to float
   %C = fptoui float %B to i24
   ret i24 %C
 }
 
-; This can fold because the 25-bit input is signed and we disard the sign bit.
-; CHECK-LABEL: test16
-; CHECK: zext
-define i32 @test16(i25 %A) nounwind {
- %B = sitofp i25 %A to float
- %C = fptoui float %B to i32
- ret i32 %C
+; This can fold because the 25-bit input is signed and we discard the sign bit.
+
+define i32 @test16(i25 %A) {
+; CHECK-LABEL: @test16(
+; CHECK-NEXT:    [[C:%.*]] = zext i25 [[A:%.*]] to i32
+; CHECK-NEXT:    ret i32 [[C]]
+;
+  %B = sitofp i25 %A to float
+  %C = fptoui float %B to i32
+  ret i32 %C
 }
 
 ; This can't fold because the 26-bit input won't fit the mantissa
-; even after disarding the signed bit.
-; CHECK-LABEL: test17
-; CHECK: sitofp
-; CHECK-NEXT: fptoui
-define i32 @test17(i26 %A) nounwind {
- %B = sitofp i26 %A to float
- %C = fptoui float %B to i32
- ret i32 %C
+; even after discarding the signed bit.
+
+define i32 @test17(i26 %A) {
+; CHECK-LABEL: @test17(
+; CHECK-NEXT:    [[B:%.*]] = sitofp i26 [[A:%.*]] to float
+; CHECK-NEXT:    [[C:%.*]] = fptoui float [[B]] to i32
+; CHECK-NEXT:    ret i32 [[C]]
+;
+  %B = sitofp i26 %A to float
+  %C = fptoui float %B to i32
+  ret i32 %C
 }
 
-; This can fold because the 54-bit output is signed and we disard the sign bit.
-; CHECK-LABEL: test18
-; CHECK: trunc
-define i54 @test18(i64 %A) nounwind {
- %B = sitofp i64 %A to double
- %C = fptosi double %B to i54
- ret i54 %C
+; This can fold because the 54-bit output is signed and we discard the sign bit.
+
+define i54 @test18(i64 %A) {
+; CHECK-LABEL: @test18(
+; CHECK-NEXT:    [[C:%.*]] = trunc i64 [[A:%.*]] to i54
+; CHECK-NEXT:    ret i54 [[C]]
+;
+  %B = sitofp i64 %A to double
+  %C = fptosi double %B to i54
+  ret i54 %C
 }
 
 ; This can't fold because the 55-bit output won't fit the mantissa
-; even after disarding the sign bit.
-; CHECK-LABEL: test19
-; CHECK: sitofp
-; CHECK-NEXT: fptosi
-define i55 @test19(i64 %A) nounwind {
- %B = sitofp i64 %A to double
- %C = fptosi double %B to i55
- ret i55 %C
+; even after discarding the sign bit.
+
+define i55 @test19(i64 %A) {
+; CHECK-LABEL: @test19(
+; CHECK-NEXT:    [[B:%.*]] = sitofp i64 [[A:%.*]] to double
+; CHECK-NEXT:    [[C:%.*]] = fptosi double [[B]] to i55
+; CHECK-NEXT:    ret i55 [[C]]
+;
+  %B = sitofp i64 %A to double
+  %C = fptosi double %B to i55
+  ret i55 %C
 }