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Diffstat (limited to 'test/Transforms/InstCombine/cast.ll')
| -rw-r--r-- | test/Transforms/InstCombine/cast.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/cast.ll b/test/Transforms/InstCombine/cast.ll index de738bb7c0..ff2c0a9289 100644 --- a/test/Transforms/InstCombine/cast.ll +++ b/test/Transforms/InstCombine/cast.ll @@ -898,3 +898,31 @@ define double @test81(double *%p, float %f) { %l = load double* %r ret double %l } + +define i64 @test82(i64 %A) nounwind { + %B = trunc i64 %A to i32 + %C = lshr i32 %B, 8 + %D = shl i32 %C, 9 + %E = zext i32 %D to i64 + ret i64 %E + +; CHECK: @test82 +; CHECK-NEXT: [[REG:%[0-9]*]] = shl i64 %A, 1 +; CHECK-NEXT: %E = and i64 [[REG]], 4294966784 +; CHECK-NEXT: ret i64 %E +} + +; PR15959 +define i64 @test83(i16 %a, i64 %k) { + %conv = sext i16 %a to i32 + %sub = add nsw i64 %k, -1 + %sh_prom = trunc i64 %sub to i32 + %shl = shl i32 %conv, %sh_prom + %sh_prom1 = zext i32 %shl to i64 + ret i64 %sh_prom1 + +; CHECK: @test83 +; CHECK: %sub = add nsw i64 %k, 4294967295 +; CHECK: %sh_prom = trunc i64 %sub to i32 +; CHECK: %shl = shl i32 %conv, %sh_prom +} |